Method and composition for removing radiation-curable, pigmented, artificial nail gel coatings

ABSTRACT

A method and composition for removing UV cured nail gel wherein the composition comprises acetone and an alkoxylated lanolin oil is disclosed. The method comprises applying the composition to a cured nail gel and allowing the composition to soak.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a divisional of application Ser. No. 13/434,408,filed Mar. 29, 2012, granted as U.S. Pat. No. 8,697,619 on Apr. 15,2014. Benefit of the filing date of said application is claimed.

BACKGROUND OF THE INVENTION

This invention relates to the field of radiation-curable gels useful forcosmetic adornment of natural nails. More particularly this inventionrelates to methods and compositions for removing radiation cured nailgels.

The use of radiation-curable gels in formation of nail enhancements orartificial nails has been an important part of the cosmetic industrysince it was first introduced. U.S. Pat. No. 4,682,612, describing theuse of actinic radiation-curable compositions suitable for preparationof artificial nails, is representative of this technology.

Ultra-violet radiation (UV) is the most conventional form of radiationused to cure gels in this art, however, visible light curing systems arealso known. Professional nail technicians most typically apply UVcurable gels designed for sculpting nails. Such UV-curable gels areusually composed of acrylic or methacrylic monomers and oligomers in agel-like state that requires curing under a UV lamp. Such nail finishescan be applied directly to natural fingernails or toenails, oralternatively can be applied to nail extensions bonded to fingernails.In many cases, the artificial nails are coated with conventional nailpolish after they are cured.

In addition, a considerable advantage of the use of the UV nail gel forthe customer and the person performing the application is the reducedtime needed to harden. A customer can spend up to an hour waiting forthe solvent in nail enamel to evaporate, while the gel is set in 3minutes or less. Diadvantageously, due to the crosslinked polymer whichis formed while curing these gels they are much more difficult to removethan normal nail polishes. Thus, there is a need for compositions thatgive improved soak off capabilities.

This object, and others which will become apparent from the followingdisclosure are achieved by the present invention which comprises in oneaspect a composition comprising acetone and a derivatized lanolin,namely alkoxylated lanolin oil.

In another aspect the invention comprises a method comprising applyingthe composition of the invention to radiation cured nail gel, allowingthe composition to soak for a period of time, and then removing thecured nail gel.

In some embodiments the lanolin oil is ethoxylated and propoxylated. Theinvention also comprises including about 2 to 3% by weight of thealkoxylated lanolin oil in the composition, the balance being primarilyacetone and optionally other solvents known in the art, emollients, anddyes.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

By the term “nail gel,” we mean a radiation-curable compositioncomprising photoinitiator, ethylenically unsaturated monomers and/oroligomers, having a viscosity suitable for coating natural or artificialnails, or artificial nails and extensions, as well as adorning suchnails.

There are many possible embodiments of the nail gel. In some embodimentsthe gel is comprised of 50-70% by weight of an aliphatic polyester basedurethane multimethacrylate oligomer, 15-25% by weight 2-hydroxyethylmethacrylate (HEMA), 15-25% by weight 2-hydroxypropyl methacrylate(HPMA), 1-5% (photoinitiator) and 0.1-10% by weight of a thixotropicadditive, and 0.1-10% by weight FD&C Red #7 Calcium Lake pigment. Otherembodiments can be comprised of aliphatic polyester based urethanediacrylate oligomer and FD&C Red #6 lake pigment.

The cured nail gel removal composition of the invention comprisesacetone, optional conventional additives including other solvents, and aderivatized lanolin which is an alkoxylated lanolin oil. Suitableamounts of alkoxylated lanolin oil are between 1 and 5% but morepreferably about 2 to 3%. We have observed soaking time is optimized ataround 2.5% of many embodiments.

UV-curable artificial nail gels can be comprised of a wide variety ofcompounds containing one or more radical polymerizable unsaturateddouble bonds. Typical examples include esters and amides of acrylic andmethacrylic acid. The esters of acrylic and methacrylic acid are hereintermed (meth)acrylic ester. Specific but not limiting examples of monomethyl (meth)acrylic esters include: methyl (meth)acrylate, ethyl(meth)acrylate hydroxypropyl (meth)acrylate, ethyl (meth)acrylate, butyl(meth)acrylate, hydroxy ethyl (meth)acrylate, butoxyethyl(meth)acrylate, diethylaminoethyl (meth)acrylate, 2-ethylhexyl(meth)acrylate, ethoxyethyl (meth)acrylate, t-butyl aminoethyl(meth)acrylate, methoxyethylene glycol (meth)acrylate, phosphoethyl(meth)acrylate, methoxy propyl (meth)acrylate, methoxy polyethyleneglycol(meth)acrylate, phenoxyethylene glycol (meth)acrylate,phenoxypolyethylene glycol (meth)acrylate, 2-hydroxy-3-phenoxypropyl(meth)acrylate, 2-(meth)acryloxyethylsuccinic acid,2-(meth)acryloylethylphthalic acid, 2-(meth)acryloyloxypropylphthalicacid, stearyl (meth)acrylate, isobornyl (meth)acrylate,3-chloro-2-hydroxypropyl (meth)acrylate, tetrahydrofurfuryl(meth)acrylate, (meth)acrylamides and allyl monomers. Specific but notlimiting examples of difunctional methacryl esters include: 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1,9-nonanedioldi(meth)acrylate, 1,10-decanediol di(meth)acrylate, neopentyl glycoldi(meth)acrylate, 2-methyl-1,8-octane diol di(meth)acrylate, glyceroldi(meth)acrylate, ethylene glycol di(meth)acrylate, triethylene glycoldi(meth)acrylate, polyethylene glycol di(meth)acrylate, polypropyleneglycol di(meth)acrylate, ethoxylated propylene glycol di(meth)acrylate,ethoxylated polypropylene glycol di(meth)acrylate, polyethoxypropoxydi(meth)acrylate, ethoxylated bisphenol A di(meth)acrylate, propoxylatedbisphenol A di(meth)acrylate, propoxylated ethoxylated bisphenol Adi(meth)acrylate, bisphenol-A glycidyl methacrylate,tricyclodecanedimethanol di(meth)acrylates glycerin di(meth)acrylate,ethoxylated glycerin di(meth)acrylate, bis acrylamides, bis allyl ethersand allyl (meth)acrylates. Examples of tri and or higher (meth)acryloylesters include trimethylol propane tri(meth)acrylate, ethoxylatedglycerin tri(meth)acrylate, ethoxylated trimethylolpropanetri(meth)acrylate, ditrimethylol propane tetra(meth)acrylate,pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate,propoxylated pentaerythritol tetra(meth)acrylate, ethoxylatedpentaerythritol tetra(meth)acrylate, dipentaerythritolpenta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, andethoxlated iscyanuric acid tri(meth)acrylates.

Urethane(meth)acrylates having at least two or more acryl or methacrylgroups and a urethane group can also be used. Examples include:urethanes based on aliphatic, aromatic, polyester, and polyether polyolsand aliphatic, aromatic, polyester, and polyether diisocyanates cappedwith (meth)acrylate end-groups. Isocyanate prepolymers can also be usedin place of the polyol-diisocyanate core. Epoxy (meth)acrylates andepoxy urethane (meth)acrylates, useful in the present invention, have atleast two or more acryl or methacryl groups and, optionally, a urethanegroup. Examples include epoxy (meth)acrylates based on aliphatic oraromatic epoxy prepolymers capped with (meth)acrylate end-groups. Aaliphatic or aromatic urethane spacer can be optionally inserted betweenthe epoxy and the (meth)acrylate endgroup(s). Acrylated polyesteroligomers, useful in the present invention, have at least two or moreacryl or methacryl groups and a polyester core. Acrylated polyetheroligomers, useful in the present invention, have at least two or moreacryl or methacryl groups and a polyether core. Acrylated acrylateoligomers, useful in the present invention, have at least two or moreacryl or methacryl groups and a polyacrylic core. These reactiveurethanes, epoxies, polyesters, polyethers and acrylics are availablefrom several suppliers including BASF Corporation, BayerMaterialScience, Bomar Specialties Co, Cognis Corporation, CytecIndustries Inc, DSM NeoResins, Eternal Chemical Co, Ltd, IGM Resins,Rahn AG, Sartomer USA, LLC, and SI Group, Inc.

In addition to the above-described (meth)acrylate-based polymerizablemonomers, other polymerizable monomers, oligomers or polymers ofmonomers which contain at least one free radical polymerizable group inthe molecule may be used without any limitations in the curable gel.These monomers may contain other groups such as carboxyl groups toimprove adhesion.

A compound having at least one free radical polymerizable group includesnot only a single component but also a mixture of polymerizablemonomers. Thus, combinations of two or more materials containing freeradical polymerizable groups may be used in combination.

The gels also contain a photoinitiator. Examples of these include:benzyl ketones, monomeric hydroxyl ketones, polymeric hydroxyl ketones,alpha -amino ketones, acyl phosphine oxides, metallocenes, benzophenone,benzophenone derivatives, and the like. Specific examples include:1-hydroxy-cyclohexylphenylketone, benzophenone,2-benzyl-2-(dimethylamino)-1-(4-(4-morphorlinyl)phenyl)-1-butanone,2-methyl-1-(4-methylthio)phenyl-2-(4-morphorlinyl)-1-propanone,diphenyl-(2,4,6-trimethylbenzoyl) phosphine oxide, phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide, benzyl-dimethylketal,isopropylthioxanthone, and mixtures thereof.

Photo accelerators such as aliphatic or aromatic amines may also beincluded in the gel as well as fillers, inhibitors, plasticizers,polymers, and adhesion promoters.

Gels with or without pigment can be used.

Suitable pigments which can be incorporated into the gels includebarium, calcium and aluminum lakes, iron oxides, chromates, molybdates,cadmiums, metallic or mixed metallic oxides, talcs, carmine, titaniumdioxide, chromium hydroxides, ferric ferrocyanide, ultramarines,titanium dioxide coated mica platelets, and/or bismuth oxychlorides,Preferred pigments include D&C Black No. 2, D&C Black No. 3, FD&C BlueNo. 1, D&C Blue No. 4, D&C Brown No. 1, FD&C Green No. 3, D&C Green No.5, D&C Green No. 6, D&C Green No. 8, D&C Orange No. 4, D&C Orange No. 5,D&C Orange No. 10, D&C Orange No. 11, FD&C Red No. 4., D&C Red No. 6,D&C Red No. 7, D&C Red No. 17, D&C Red No. 21, D&C Red No. 22, D&C RedNo. 27, D&C Red No. 28, D&C Red No. 30. D&C Red No. 31, D&C Red No. 33,D&C Red No. 34, D&C Red No. 36, FD&C Red No. 40, D&C Violet No. 2, Ext.D&C Violet No. 2, FD&C Yellow No. 5, FD&C Yellow No. 6, D&C Yellow No.7, Ext. D&C Yellow No. 7, D&C Yellow No. 8, D&C Yellow No. 10, D&CYellow No. 11, as well as others listed on the FDA color additiveswebsite, and Annex IV of the Cosmetic Directive 76/768/EEC, ColoringAgents Permitted in Cosmetics as of Mar. 1, 2010.

EXAMPLES Example 1

A nail gel removal composition was prepared with the followingcomponents and amounts.

TABLE 1 Material % by weight Violet #1 Dye 0.0012 Powder Violet #2 Dye0.0621 Solution Alkoxylated 2.5694 lanolin oil (Ritalan Aws brand)Acetone 97.3673

Swell time in seconds was measured for compositions having varyingamounts of alkoxylated lanolin oil and the results were as follows:

UV Curable Swell Std Gel Solvent Time Deviation Gelinium 100% 481 45Gloss¹ Acetone Gelinium 2.5% Lanolin 383 16 Gloss¹ in Acetone Gelinium5% Lanolin in 408 26 Gloss¹ Acetone Gelinium Clear¹ 100% 222 12 AcetoneGelinium Clear 1.25% 190 10 Lanolin in Acetone Gelinium Clear¹ 2.5%Lanolin 168 14 in Acetone Gelinium Clear¹ 3.75% 226 56 Lanolin inAcetone Gelinium Clear¹ 5% Lanolin in 230 28 Acetone ¹Available FromAmazing Products NV/SA, Boomgardreef 9, B-2900 Schoten, Belgium.

Lower swell time indicates better efficiency for removing UV cured nailgel.

The present invention, therefore, is well adapted to carry out theobjects and attain the ends and advantages mentioned, as well as othersinherent therein. While the invention has been depicted and describedand is defined by reference to particular preferred embodiments of theinvention, such references do not imply a limitation on the invention,and no such limitation is to be inferred. The invention is capable ofconsiderable modification, alteration and equivalents in form andfunction, as will occur to those ordinarily skilled in the pertinentarts. The depicted and described preferred embodiments of the inventionare exemplary only and are not exhaustive of the scope of the invention.Consequently, the invention is intended to be limited only by the spiritand scope of the appended claims, giving full cognizance to equivalentsin all respects.

What is claimed is:
 1. A method of removing UV-cured nail gel from acoated human nail comprising applying a composition comprising analkoxylated lanolin oil and at least one solvent comprising acetone tothe cured nail gel and allowing the composition to soak into the curednail gel for a period of time until the cured nail gel becomes removablewherein the acetone comprises from 95% to 98.75% by weight of thecomposition.
 2. The method of claim 1 wherein the at least one solventis further comprises ethyl acetate.
 3. The method of claim 1 wherein thealkoxylated lanolin oil comprises about 2% to 3% by weight of thecomposition.
 4. The method of claim 1 wherein the alkoxylated lanolinoil is an ethoxylated/propoxylated lanolin oil.
 5. The method of claim 1wherein the alkoxylated lanolin oil is PPG-12-PEG-65 lanolin oil whereinPPG is polypropylene glycol and PEG is polyethylene glycol.
 6. Themethod of claim 1 wherein the alkoxylated lanolin oil comprises 1.25% to5% by weight of the composition.
 7. The method of claim 1 wherein thesolvent consists of acetone.
 8. The method of claim 1 wherein thesolvent consists of acetone and the alkoxylated lanolin oil comprises1.25% to 5% by weight of the composition.
 9. The method of claim 8wherein the alkoxylated lanolin oil is PPG-12-PEG-65 lanolin oil whereinPPG is polypropylene glycol and PEG is polyethylene glycol.
 10. Themethod of claim 8 wherein the alkoxylated lanolin oil is anethoxylated/propoxylated lanolin oil.
 11. The method of claim 1 whereinthe composition is allowed to soak into the nail gel a period of timeranging from 168 seconds to for less than 481 seconds until the nail gelbecomes removable.